Stroke adjuster for auxiliary fuel-feeding devices



FlLED DEC, 24, 1919 Wness @.54 W124/www jam, 3Q?, wZ R S R H439502 lSTROKE ADJUSTER FOR AUXILIAR UEL FEEDING DEVICES.

FILED DEC. 24. |919, 2 SHEETS-SHEET 2 Patented dan. BO, i923.

ROBERT SANFORD RILEY,

0F WORCESTER, MASSACHUSETTS, ASSIGNOR TO SANFORD RILEY STOKER CO., OFWORCESTER, MASSACHUSETTS, A CORPORATION 0F MASSA- cHUsisTTs.

STROKE ADJUSTER FOR AUXILIARY FUEL-FEEDING DEVICES.

Application led December a4, 191i) Serial No. 347,088.

To all whom 'it may concern.'

Be it known that I, ROBERT SANFoRn RILEY, al citizen of the UnitedStates. residing at iVorcester, in the county of `Worces ter and Stateof Massachusetts, have invented new and useful Stroke Adjusters forAuxiliary Fuel-Feeding Devices, of which the following is aspecification.

This invention relaites to a fuel feeding mechanism and particularly tothat type in which the fuel is fed into the furnace by a reciprocatingplunger which 'by its motion, gives a smaller degree of motion to anauxiliary means for further feeding the fuel toward the discharge pointof the furnace.

The principal objects of the present invention are to provide animproved meains for regulating the extent of movement of the auxiliarfuel feeding device; to provide regulating means which can be readilyand easily adjusted by hand. and which will be so arranged with respectto the rest ot' the apparatus as to aivoid any possibility of damagewhich might be caused in the old construct-ions by an inaccurate placingof thel adjusting elements; to provide a. simple-smeans for holding theadjusting mechanism in proper adjusted position; to provide an adjustingmeans constructed on the principle of ai curved block preferably havingabrupt steps as stops to control the stroke of the auxiliary fuelfeeding device; and to form the top of the adjuster so as to form anindicator to show the condition of the adjustment to whichl the deviceis set.

Further objects and advantages of the invent-ion will appearhereinafter. Reference is to be had to the accompanying drawings. inwhich Fig. 1 is a plan of a Stoker of the type illustrated in my priorPatent No. 1.090.651, dated March 17, 1914. showing a preferredembodiment of this invention applied thereto;

Fig. 2 is a side view;

Fig. 3 is a side view on enlarged scale, and

Fiig. 4 is a transverse sei-tional view on the line 4-4 of Fig. 3.

The invention is shown ais applied to a type of self-feeding stokerwhich involves a plurality of retorts all alike, each olie having astationary retort bottom 3 and longitudinally movable side walls 4. iiirsupplying outlet members 5 are mounted upon the upper edges of the walls4 and move with them for the purpose and in the manner described insaidl patent. Also it will be understood that the fuel is fed from eachhopper 8 by means 'of a reciprocating plunger 11. This plunger forcesthe fuel into the forward end of the retort and constitutes a primaryfuel feeder. The side walls 4 and air supplying members 5- constituteauxiliary fuel feeding devices and are reciprocated with a' reducedextent of motion by the primary feeder by connections comprising bars 15ha\f'ingeforwardly extending rods 17 each provided with a head 21. Twoof these rods pass through opposite ends of a wrist pin 19 which extendsthrough the plunger. Thus each plunger operates a side wall on each sidethereof through a rod 17. This wrist pin 19 reciprocates positively ofcourse, with the plunger. as is the case in the above mentioned patentand also in my Patent No. 1.284.929. dated Nov. 12, 1918. The wrist pinpositively moves the rod 17 back to a. definite position on each outwardstroke by engaging the head 21 and forces it inward throughoutI the lastpart of its operative stroke by transmitting its motion to the bar 15.The rest of the stroke constituteslost motion as far as the side wallsare concerned as is well understood.

According to my above mentioned patent of Nov. 12. 1918. removableblocks or fillers were placed on the rod 1T to regulate the amount ofmotion of the side walls 4. One of the objects of this invention is toavoid the use of removable members which may be displaced in one way oranother or lost and to provide a device which will always be in placeready to be adjusted to the proper position to secure. the necessaryamount of motion of the side walls and air supplying outlet members.

For this purpose, mount the end of a spring Q2 in a casting 18 or thelike on the' head '21 of each rod 1T. This spring is shown as having ahorizontal portion .se-

cured in position by a screw 2O and as provided with a coilat 23 and adownwardly extending U-shaped portilon. The extreme end of this U-shapedportionvextends into an adjuster block which is supported by thisspring. The resiliency of the spring is such and its shape is sodesigned that it will normally tend to hold this block inwardly towardthe retort and up in the posi-- tion shown in Fig. 3. In that positionthe bottom or widest p-art of the adjuster contacts with the end of thebar 15 and consequently a maximum extent of motion is given tlo theauxiliary fuel feeding device, on each stroke of the plunger'.I Thewrist pin engages the adjuster at its widest portion near the end ofeaich stroke and moves it a distance corresponding to the thickness ofthe adjuster at that point.

The adjuster is made of different widths `above and I prefer toaccomplish this by means of steps 26 so as to get a plurality ofdefinite motions of the auxiliary'fuel feeding device. It will be seentherefore that 'the adjuster block 25 can be lowered one step, or twosteps if desired, as shown in Fig. 2 and thus there will be a narrowerpart of the 'adjuster between the wrist pin andA the bar 15. 30-

Consequently, the extent of motion of this bar will be reducedacordingly.

' it as shown and extending from it at a definite parts.

two of these for each plunger and thereare angle so that when theadjuster is in itsv lowermost position, as indicated in Fig. 2, thishandle will be horizontal and will extend just above the tops of theassociated It is to be understood that there are several plungers acrossthe stoker and these several handles will indicate whether all of theadj usters are in the same position. They also indicate when they areall in lowermost position, namely, that in whichv the side walls havethe smallest motion. The adjuster 25 has a projection 28 at the bottomcoming up under a shoulder 29 of the casin and limiting the upwardmotion of the a juster to the position shown in Fig. 3.

n operation, assuming that the parts are in the positio'n shown in Fig.3, if it is found that thev auxiliary feeding device had too great anextent of motion, this may be reduced lfor each individual` side w'allby simply grasping the several handles 27 one after another ,and forcingthe adjusters down against the resistance of the springs 22. It can` bedone also simply by delivering a blow downwardly on each handle. This isdone, of course, when the wrist pin isa suilicient distance away fromthe adjuster.

It will be observed that the spring not only forces the adjuster up, butforces it toward ther grate bars so that the mere pushing down of thehandle far enough to drop the next step 26 below the edge of the bar 15will automatically result lin the forward motion of the adjuster toproject that next step under the end of the plunger vand prevent itsrising until pulled back and replaced by the operator. When moved up theabrupt edge of each step will serve as a stop by coming against thebottom of the bar 15.

It will be seentherefore that in operation each side bar 15 controls themovement of its corresponding side rod as inthe case of my abovementioned patent of Nov. 12, 1918 and that the side bar withdraws theside rod to the same position on each return stroke independently of thefeatures of this invention. But the travel toward the bridge wall isvaried bychanging the amount of lost motion by the extremely simpleadjustment of the stroke above described.

'-This adjuster is so constructed that it 'can not get out of place.Alldanger of misplacing it, which has been present in formerconstructions, is done away with and it is always in position readyytobe adjusted in accordance with the will of the operator. Furthermore,the top of the adjuster is so shaped that it can be seen at a glancewhether all the adjusters are in the same position and whether thatposition is the right one.

I am aware of the fact that modifications can be made in this inventionand that it can be applied to other types of stokers or fuel feedingmachines than the one illustrated herein without departing from thescope of the invention as expressed in the claims.

Therefore I do not wish to be limited 4in these respects, but what I doclaim is 1. The combination with a plunger for feeding fuel or the like,an auxiliary feeding device, and a lost motion connection between themfor transmitting part of the motion of the plunger toy the auxiliaryfeeding device, of an adjuster having portions differing in width in thedirection of the length of the stroke of the plunger arranged inthe formof steps, and means connected with the adjuster tending to'move it so asto bring its widest portion into operative position for supporting it inits adjusted positions, said adjuster being movable transversely intodifferent positions in the path of the lostmotion connection with theedge of a step limitin its movement in the direction in which sai meanstends to move it, so that its portions of different width `will vary theeffective length of said motion;

2. In a stroke adjuster for an auxiliary fuel feeding device, thecombination with` a main fuel feeding device having a plunger, forfeeding fuel providedwith a wrist pin thereon andan auxiliary fuelfeeding device having a bar connected with it for moving it, of a blockhaving a series of portions of dierent Widths rranged in the form ofsteps adapted to be placed between the plunger Wrist pin of the meinfuel feeding' device and the end of the' br connected with the auxiliaryfuel `feeding device to very the stroke thereof, the ends of said stepsserving as stops by coming against vthe bar, said block being movabletransversely with respect to the stroke of the Wrist pin to bring thedifferent portions into opei'ation, and a l0 spring for holding theedges of the steps against the bai'.

In testimony whereof l have hereunto affixed my signature. f

ROBERT SANFORD RELEY.

